package lab02.text37;

/**
 * Created by Administrator on 2017/11/21.
 */
public abstract class Student {
    String name;
    String sno;
    double[] scores=new   double[3];
    String grade;
    double calAverage(){
        return (scores[0]+scores[1]+scores[2])/3;
    }
    abstract String calGrade();
}

